Reaction III is an interesting effort by nihilyst made using the AGS engine. In the game, your objective is to guide a grey dot to the exit while pressing the keys highlighted on the left side of the screen.

The grey dot must not touch the walls else you have to start all over again from the spawn point. Progress can be saved by touching a green square found in some levels. Fortunately, the game allows for unlimited retries instead of punishing the player for failing repeatedly.

Three difficulty levels are available for selection from the main menu.